Yesterday’s post described the history of personal computing platforms over the past 37 years. It showed a distinct shifting of “eras” between traditional personal computing and the emergent mobile computing represented by device-based platforms.

Underlying these lives (and deaths) of platforms were the growth (and decline) of fortunes of companies and people. I hoped that by observing these patterns insight could be gained into the conditions for success or failure.

The following graph shows the companies which were predominant (in the top five ranking by shipments[1]) during each year of the industry’s history and the volumes they were able to obtain during that period. I also added Nokia and RIM as examples of the challengers coming from mobile devices.